Super X-Drive(SXD-V3) repair

[nmbusa]

Hi ya fellas
For anyone like me mistakenly feeding reverse polarity to their x-drive and frying main ic.
If you have a hot air rework station give it a go.




set pot at around 1.4 KOhms outputing a nice 4.7Amps


just have to dig up a 2k and 4.7k res to parallel
worked for me like a charm. cheers

 

[nmbusa]

An otherwise useless driver ready for a new NUBM44 build
Sweet 4.996V at 4.76A

 

[Commander J. Bloodmaker]

really giving her a work out. lol

 

[nmbusa]

really giving her a work out. lol

its a he

 

[Commander J. Bloodmaker]

my bad.

 

[nmbusa]

really giving her a work out. lol

I dont think 4.7A is really stressing diode as others have pushed to 5.5A

 

[RedCowboy]

You are just making waste heat in a hurry pushing a nubm44 above 4.5a and knocking your output down unless you only lase for a few seconds from a cold start, to do any good beyond 4.5a you need active cooling.

 

[Commander J. Bloodmaker]

I run my 44 @ 2.5 to 3, active cooling, with pelter if i so wish to stabilize the wave. I can run it way , way higher with temps staying reasonable. I like it though, and don't want to kill it.

 

[Andrew124C41]

Hi ya fellas
For anyone like me mistakenly feeding reverse polarity to their x-drive and frying main ic.
If you have a hot air rework station give it a go.


View attachment 72978

set pot at around 1.4 KOhms outputing a nice 4.7Amps
View attachment 72981View attachment 72982

just have to dig up a 2k and 4.7k res to parallel
worked for me like a charm. cheers

I accidentally did a reverse polarity goof. But, I don't understand the fix for it.

 

[nmbusa]

I accidentally did a reverse polarity goof. But, I don't understand the fix for it.

have to change main ic which has blown even if no burn mark is visible

 

[Andrew124C41]

have to change main ic which has blown even if no burn mark is visible

I thought there was some kind of reverse polarity protection......something else that blows. Where do you get the IC? BTW, your opinion. I have used all of these.....which ones do you like...ACS, SuperX and Astral. What I like about both the ACS and the Astral is that you don't have to bridge resisters. The ACS seems to be very stable and hard to screw up.....but it is a little more difficult to thermally bond.

 

[nmbusa]

I thought there was some kind of reverse polarity protection......something else that blows. Where do you get the IC? BTW, your opinion. I have used all of these.....which ones do you like...ACS, SuperX and Astral. What I like about both the ACS and the Astral is that you don't have to bridge resisters. The ACS seems to be very stable and hard to screw up.....but it is a little more difficult to thermally bond.

as you're in the us of a, digikey mouser or straight from texas instruments.
only used super x which I got ages ago set at a fixed 2.4A for a NDB7875,now set at 4.7A

 

[Andrew124C41]

as you're in the us of a, digikey mouser or straight from texas instruments.
only used super x which I got ages ago set at a fixed 2.4A for a NDB7875,now set at 4.7A

For a 7875...4.7...a lot of juice! Do you know the part number for the ic

 

[nmbusa]

cummon now not to be rude look carefully at whole post 4.7A of "juice"is for NUBM44
part number is in photo

 

[Andrew124C41]

Sorry lol. Me bad!